Combination heater-range



Nov. 10, 1936. J. E. LEONARD COMBINATION HEATER RANGE Filed April 9, 1934 FIE .IE

INVENTOR Jess/w 5'. L a/vmm BY MAW J ATTORNEY Patented Nov. 10, 1936 Joseph E.

Hammer-Bray' corporation of Nevada Leonard, Berkeley, Calif.,assignor to Company, Oakland,

Calii'., a

Application April 9, 1934, Serial No. 719,651

10 Claims; -(Cl.'1264) The invention relates to stoves or ranges equipped with both a cooking unit and a heater unit, and relates more particularly to such type of ranges in which the heater unit combines with the cooking unit to provide increased cooking area.

An object of the invention is to provide a range having, in addition to a heater such as described, a trash incinerator which is combined and associated with the heater to form a composite stove element practically no greater'in size than, but as effective and affording as great a capacity as, a heater or an incinerator such as heretofore provided on the range one without the other.

Another object of the invention is to so incorporate with the range both a full capacity aircirculating heater and a trash incinerator, that there will be practically no change in the size or appearance of the range as compared with one otherwise the same but having entirely omitted therefrom either the heater or the trashincinerator.

A further object of the invention is to associate the heater and incinerator in such manner that while there is an interrelation in the structure so as to permit of maximum compactness for a given capacity oi" each, the operation of either may be effected substanitally without interfering with or impairing the operation of the other.

A still further object of the invention is to so design the heater and incinerator and associate them together that the heat furnished by one unit will be effective for directly warming the top of both units and thereby making available a cooking surface of considerable area usable together with or separately of the cooking area otherwise provided on the range.

Yet another object of the invention is to provide a gas-operated air-circulating heater in which the gas burning chamber and the air circulating passages are so arranged that, notwithstanding an extremely narrow width of the entire heater, very eflicient burning of the gas and circulation of the air will be aflorded.

The invention possesses other objects and features of advantage, some of which, with the foregoing, will be set forth in the. following description of the preferred form of the invention which is illustrated in the drawing accompanying and forming part of the specification. It is to be understood, however, that variations in the showing made by the said drawing and description may be adopted within the scope of the invention as set forth in. the claims.

Referring to said drawing:

Figure 1 is a perspective view of a stovemade in accordance with my invention.

-Figure 2 is a vertical sectional view of the heater and trash burner portion of the stove, the 5 plane of the section being parallel to the front side.

Figure 3 is a horizontal sectional viewof the portion of the stove illustrated in Figure 2 and taken on the line 2-2 of said figure.

In the embodiment of the invention illustrated in the drawing, the stove or range 2, is of the well-known household kitchen type, provided with an oven 3, a broiler 4, and a top cooking portion 5. The latter is here shown as of the type having a top gas-bumer chamber 1 covered with a closed cooking-plate 8' having lids 9 in openings over the burners. Below the chamber '1 and extending therefrom to the horizontal stove frame I2 is a warming closet l3.

Preferably mounted directly on the frame and arranged immediately at the free end of the chamber 1 and closet I3 is a -heater and incinerator assembly comprising an air-circulating gas operated heater unit I [and a trash burner 25 or incinerator unit IS. The incinerator is interposed between the heater and chamber and is defined by side walls l1 and I8, a bottom wall l9, and a top plate 2| which forms a coplanar extension of the cooking plate 8. In the present embodiment, the wall 18 serves as a common side for the incinerator and the chamber 1 and the closet l3, while the wall I! provides a common side for the incinerator and the heater. Within the incinerator, between the top 2| and. a 35 grate 22 is formed a lined fire-box 23 below which is an ash pit 24 containing a removable ash pan 26. As a means of igniting the trash or the like in the fire box, and also for heating the top plate 2| thereover, there is positioned in the fire box, preferably just above the grate at the front, a gas burner 21 having communication with a suitable feed supply pipe provided on the range. For affording ready access to the flre box from the top plate, there is formed as a 45 part of such plate a hinged section 28 which may be raised as desired so as to uncover an opening in the plate normally engaged thereby.

As previously explained, the wall I! divides the incinerator from the heater, and such wall and the end wall 29 of the range form the side walls of what may be termed the heater casing. As a part of such casing is a top plate 3! which extends from and is coplanar to the plate 2| so as to provide a still further addition to the cooking plate I. The heater as aforesaid is of the selfcontalned air-circulating type, and in, accordance therewith the plate portion II, in distinction to the closed design of the portions 8 and II, is provided with openings 32 so as to permit the discharge of the warmed air through the plate during the operation of the heater. Within the heater casing, and with its side walls 33 and 84 spaced from but substantially coextensive with the walls l1 and 29, is a relatively narrow shell 3 defining therein a gas-burning or combustion chamber 31 and supported on spacers 38 secured to the frame. The shell, like the incinerator unit, extends for practically the full distance of the stove from the front to the rear thereof and, as is important to note, has its top and bottom extremities spaced inward of the top plate ll and frame I! respectively. As will be seen from Figure 3, a portion 39 of the front wall 4i of the incinerator unit is extended to overlie a portion of the space in front of the heater area, and said portion terminates at the heater shell so as to permit the latter to protrude further to the front of the stove. In order, however, that a door 42 may be utilized to cover the heater and incinerator at the front of the stove, and at the same time permit such door to lie fiush with the outer front surface of the stove, the portion 38 and the front side of the shell are set inwardly and preferably to an extent sufiicient to leave a vertical air passage in front of the shell when the door is closed. Except for an opening 43 across the entire bottom of the shell and a vent 44 at the center portion of the top thereof, the shell is closed, and as will be clear from Figure 2 there is positioned in the opening 43 a gas-burner 46 which extends practically for the full length of the openingthat is from the front to the rear of the shelland has orifices 41 which direct the gas flame up into the shell chamber. The bottom of the incinerator is desirably terminated in a higher plane than the shell, and extending under said incinerator, but above the lower edge of the frame I2, is a tubular extension 48 of the burner 46 having an air mixing chamber and a gas feed pipe connection at the outer end. The extension 48 joins the burner at a point intermediately of the fore and aft ends of the latter and thus insures an equal distribution of the fuel to the jet orifices along the entire length of the relatively long burner. At the same time the extension of the tube 48 across the incinerator provides for a long enough passage of the gas and air in the tube to insure a thorough mixing of the fuel elements by the time the burner is reached. Then too the air control valve 49 at the outer end of the tube is in a protected position yet readily accessible from under the stove for adjustment. Secondary air for the burner is admitted to the shell chamber through spaces in the opening 43 left between the edges of the opening and the burner body and lugs 54 removably attaching the burner to the bottom portion of the shell.

The side walls of the shell, as before mentioned, are spaced from the walls l1 and 29, and thereby define with the latter walls vertical passages and I! which lead to the top openings 32 so as to allow for movement and discharge of the columns of air warmed in said passages when the burner is lighted. Preferably in order to more effectively communicate the heat from the shell to the air in circulating passages 5| and 52, the shell walls are formed to converge upwardly and there are provided on the outer sides of the said walls a plurality of horizontally spaced vertically extending fins 53. Admission of air within the heater casing is aiforded not only through the bottom thereof, but by way of a relatively large opening 54 provided in the wall 29 approximately opposite the zone in the shell where the heat is greatest, that is at the tips of the flame from the gas issuing from the burner 46. The opening 54 is practically coextensive with the burner, and by reason of its position as aforesaid it will serve to permit direct radiation of the heat from the shell to the exterior of the stove in a most 'eflfective manner. Exit of the hot air is also preferably aflforded through an opening 56 in the wall 29 immediately below the upper edge thereof. Grilles 51 of suitable design are arranged to be engaged in the openings 54 and 56.

It will be noted that due to the extreme height of the heater shell, not only will the air in the passages have a relatively long period of direct thermal association with the air warming element of the heater unit, but the fuel in the shell chamber will have ample opportunity of being consumed by the time vent 44 is reached. A rather important feature of the heater-incinerator combination in the present embodiment of the invention is the venting arrangement of the products of combustion from the shell. As will be clear from Figure 2, the vent 44 instead of directing the products immediately without the stove, is so designed as to cause said products to be conveyed through the fire box before being allowed to escape from the stove. In this way, whatever heat remains in the products on leaving the shell will to a large extent be transferred to the plate 2| before the products find their way out of the flre box through the discharge opening 58. With the course of the heated products thus directed to warm the fire box top, not only will the capacity of the heater be appreciably increased, but the plate 2! as well as the plate 3! may be used during the operation of the heater for augmenting the plate 8 as a cooking surface. By reference to Figure 2 it will be seen that the wall I! at its juncture with the top plate portions is along a line almost overlying the central portion of the heater unit. By reason of this design, an increased area is provided for the plate 2i and the portion thereof over the heater unit as well as that directly over the fire box proper will be available for cooking as well when the fire box instead of the heater is being utilized.

A feature affording considerable safety in the use of the heater is had by reason of the fact that the products from the shell may discharge into the air circulating space of the heater as well as into the fire box. Thus as shown in Figure 2, the lower side of the vent 44 is open, and in this manner should venting of the products through the fire box become impaired, the products will be forced downwardly through the bottom side of the vent and directly into the passage 52 from whence they may find their way to the openings 32 in the top 3i. Preferably in order to prevent the products from venting through the circulating passages unless the necessity therefore arises, a bafile BI is extended downwardly so that escape of the products cannot be effected unless the pressure is great enough to force them to a point below the lower end 62 of the baffle. A deflector 63 at the top of the vent serves to direct the products toward the middle of the fire box.

The construction is such that in front and behind the deflector 63, openings are left above the chamber 31, whereby space 52 communicates with space Owing to the fact that an air space is provided for the full height of the stove in front of both the heater and incinerator units and at the side wall of the heater, the front of the stove as well as the end thereof will be kept relatively cool notwithstanding the use of the heater and incinerator to its fullest capacity. On theother hand should it be desired to take advantage of heat radiation from the front of the units, it is merely necessary to open the door 42. Opening of such door, as will also readily be evident, affords easy access to the sight openings 64 and 65 and other parts on the heater and incinerator when desired.

I claim:

1. In a stove of the character described, a composite stove element comprising a shell with a combustion chamber therein and an incinerator with a fire box in substantially side by side relation, said shell and fire box being coextensive from the front to the rear of the stove, means providing an end wall for said stove and defining with a side of said shell an air passage therebetween, and a hinged member providing the stove portion at the front of said shell and box and arranged in closed position to lie spaced from the front of the shell and box to provide an air chamber therewith.

2. A stove of the character described comprising, a hot air circulating heater including a shell providing a combustion chamber therein and an incinerator with a flre box positioned in side by side relation at the front of the stove, and a door providing the stove portion at the front of said shell and box and being positioned when closed to lie spaced from the front of said shell and box to provide an air passage therebetween.

3; In combination, a stove including ,a combustion chamber, said stove having a top plate, a flue, said combustion chamber having an outlet to said flue, a gas operated fresh air heater in said stove having a passageway for the products of combustion therefrom to said combustion chamber, said combustion chamber and fresh air heater being in juxtaposed position to thereby define a fresh air passageway in heat interchange relation with both said combustion chamber and said fresh air heater.

' 4. In combination, a stove including a combustion chamber, said stove having a top plate, a

bustion chamber and fresh air heater.

5. In combination, a stove including a combustion chamber, said'stove having a top plate, a flue, said combustion chamber having an outlet to said flue, a gas operated fresh air heater in said stove having an outlet for the products of combustion to said flue, and being in juxtaposed position to said combustion chamber, a passageway for fresh, air between said air heater and said combustion chamber in heat interchange relation with both said heater and said combustion chamber, said combustion chamber being located beneath said top plate.

6. In combination, a stove including a combustion chamber, said stove having a'top plate, a flue, said combustion chamber'having an outlet to said flue, a gas operated fresh air heater in said stove having an outlet for the products of combustion to said flue, and being in juxtaposed position to said combustion chamber, a passageway for fresh air between said air heater and said combustion chamber in heat interchange relation with both said heater and said combustion chamber, said combustion chamber and said heater-being located beneath said top plate.

7. In combination, a stove including a combustion chamber, said stove having a top plate, a flue, said combustion chamber having an outlet to said flue, a gas operated fresh air heater in said stove having a passageway for the products of combustion therefrom to said flue, passageways for fresh air, at least one of which is between said heater and stove wall and on at least two sides of said heater, one of said passageways being in heat interchange relation with both. said heater and said combustion chamber.

8. In combination, a stove including a combustion chamber, said stove having a top plate, a flue, said combustion chamber having an outlet to said flue, a gas operated fresh air heater in said stove having a passageway for products of combustion therefrom to said combustion chamber and flue, passageways for fresh air, at least one of which is between said" heater and said stove wall, and another of which is between said heater and combustion chamber, at least one of which is in heat interchange relation with both said heater and said combustion chamber, said heater and combustion chamber being located beneath said top plate.

9. In combination, a stove including a combustion chamber, said stove having a top plate, an outlet flue, a fluid-fuel operated fresh air heater in said stove having an outlet for the products of combustion to said flue, and being in juxtaposed position to said combustion chamber, a passageway for fresh air between said air heater and said combustion chamber in heat interchange relation with both said heater and said combustion chamber, and having an outlet from said stove through which the warmed air will discharge segregated from the products of combustion from the heater.

10. Incombination, a stove comprising a body provided with a top plate, a combustion chamber in said body, 8. fluid-fuel-operated fresh air heater in said body, said combustion chamber and fresh air heater being in juxtaposed position to deflne a fresh air passageway in heat interchange relation with both said combustion chamber and said fresh air heater, and separate outlet means for the products of combustion from said heater and the fresh air warmed in said passageway whereby contamination of said warmed air by said products is prevented and said warmed air discharged-to the outside of said body in an unadulterated state.

JOSEPH E. LEONARD. 

